Table 2 Imaging and catheter-related features

Presence of gallstones, n (%)

0.269

 Single large stone

37 (36.3)

21 (32.3)

16 (43.2)

 Multiple

65 (63.7)

44 (67.7)

21 (56.8)

Wall thickness (mm), median (Q1-Q3)

4.3 (3.5–5.5)

4.3 (3.5–5.8)

4.1 (3.5–5.3)

0.661

Gallbladder transverse diameter (mm), median (Q1-Q3)

44.5 (40.8–50)

44 (40.5–48.5)

45 (40.5–52)

0.512

Gallbladder longitudinal diameter (mm), median (Q1-Q3)

87.5 (76-102.3)

88 (75.5–102)

87 (76-102.5)

0.975

Gallbladder area (mm2), median (Q1-Q3)

3331 (2657–3737)

3329 (2539–3729)

3370 (2792–3843)

0.566

Choledochal diameter, n (%)

1.000*

 Large

3 (2.9)

2 (3.1)

1 (2.7)

 Normal

99 (97.1)

63 (96.9)

36 (97.3)

Scanning, n (%)

 Ultrasonography

88 (86.3)

55 (84.6)

33 (89.2)

0.519

 Tomography

93 (91.2)

59 (90.8)

34 (91.9)

1.000*

 MRCP

20 (19.6)

11 (16.9)

9 (24.3)

0.365

 ERCP

2 (2)

1 (1.5)

1 (2.7)

1.000*

Tokyo classification, n (%)

0.257

 Grade 2

73 (71.6)

49 (75.4)

24 (64.9)

 Grade 3

29 (28.4)

16 (24.6)

13 (35.1)

Catheter insertion time, median (Q1-Q3)

2 (1–3)

2 (1–3)

2 (2–4)

0.019

Catheter insertion time, n (%)

0.006

 In the first 24 h

40 (39.2)

32 (49.2)

8 (21.6)

 After 24 h

62 (60.8)

33 (50.8)

29 (78.4)

Catheter drainage time, median (Q1-Q3)

32 (23–46)

32 (24–45)

36 (18.5–47)

0.824

Parenteral antibiotic duration, median (Q1-Q3)

7.5 (5–10)

7 (5–10)

9 (6–14)

0.067

Strong need for antibiotics, n (%)

27 (26.5)

14 (21.5)

13 (35.1)

0.135

Growth in bile culture, n (%)

0.313

 There is reproduction

33 (32.4)

21 (32.3)

12 (32.4)

 No reproduction

25 (24.5)

19 (29.2)

6 (16.2)

 Not cultured

44 (43.1)

25 (38.5)

19 (51.4)

Gallbladder content, n (%)

0.345*

 Empyema

12 (11.8)

6 (9.2)

6 (16.2)

 Biliary

90 (88.2)

59 (90.8)

31 (83.8)

Operation after extraction (days), median (Q1-Q3)

264 (43–462)

465 (404–602)

58 (26–112)

< 0.001

Operation after recurrence (days), median (Q1-Q3)

295 (76–510)

510 (456–672)

76 (69–152)

< 0.001

Cholecystectomy, n (%)

20 (19.6)

9 (13.8)

11 (29.7)

0.052

Type of operation, n (%)

0.065

 Laparoscopic cholecystectomy

9 (8.8)

5 (7.7)

4 (10.8)

 Cholecystectomy from laparoscopic to open

6 (5.9)

4 (6.2)

2 (5.4)

 Open cholecystectomy

5 (4.9)

0

5 (13.5)

Length of stay, median (Q1-Q3)

7.5 (5-11.3)

7 (5–10)

9 (6-14.5)

0.068

Catheter-related complication, n (%)

6 (5.9)

3 (4.6)

3 (8.1)

0.665*